Hello, sorry I am late. As I understood a transmitter was not considered as there is no ham licence. I don't know in which country this will be used. Many countries offer an entry level licence which is very easy to obtain. If you have a ham licence from one country many countries have reciprocal licence agreements. In many countries you just put the local prefix ahead of your callsign. My own callsign is DH2FA if I want to operate in France I just use F/DH2FA or HB9/DH2FA in Switzerland.
OTOH there are various ISM bands which can be used without any licence, 27.12MHZ, 433MHz, 2.4GHZ, 5.7GHz come to mind. With a directional antenna it is no problem to cover several Kilometers on 2.4GHz or 5.7GHz The telescopes are probably not in a densely populated area and interferences with home based WLAN or video should be no problem. vy 73 Heinz DH2FA, KM5VTa Von meinem iPhone gesendet > Am 05.05.2016 um 06:00 schrieb Chris Albertson <[email protected]>: > > This is one of those "slap forehead" why did I not think of this. However > you have just given the developers of the post processing software a BIG > job. The distance to every transmiter to every telescope is different. > So what you have is a mesh of telescopes and transmitters and finding a > best fit is going to take some work. But I think you'd get order of > magnitude better data if you did as you say and digitize the entire band, > every station. But wow, some one will need to identify each transmitter > based on frequency and look up it's location and time align one > transmitter at a time. You can't time align the band as a whole. > > And again I don't thing you need to do this 100% of the time. You could > periodically record 100ms chunks. > > You need a large computing facility for post processing or be willing to > wait. > > ANY radio transmitter that all telescopes can receive is good. Might as > well pick the loudest things around, AM and TV broadcast. > > There are a number of SDR "kits" on the market that can sample the entire > band or maybe 2 to 4 TV stations. TV stations might be easier because TV > is channelized. > > > >> On Wed, May 4, 2016 at 3:36 PM, Bob Camp <[email protected]> wrote: >> >> HI >> >> These days, there is no need to “just use one” if you are talking about AM >> stations. Digitizing the entire AM band is pretty >> a pretty low end SDR task these days. Storing the result will take some >> storage, but noting insane; >> >> 100 Msps @ 16 bits => 200 MB / sec. >> Run overnight: 30K sec >> Total on the disk at each end: 6 TB. >> >> Yes, that’s a not a trivial disk, but it is hardly a “break the bank” sort >> of thing. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
